Network Manager doesn't play nice

[brian]

Yesterday, I enabled NM to see if it would help with an issue I was 
trying to sort out. Today, upon booting, I found that NM had overwritten 
my resolv.conf. No backup; it simply replaced the old one, which 
happened to have about half a dozen nameservers listed (some commented 
out) with one that has no nameservers listed.

Now, I had the file backed up anyway but I don't see any warning in the 
docs that it does this. Is it just me, or is this rather shoddy 
behaviour on NM's part?